patches for DPDK stable branches
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* [dpdk-stable] [PATCH] ethdev: fix secondary process change share memory
@ 2020-01-09  3:14 Fang TongHao
  2020-01-10 15:32 ` [dpdk-stable] [dpdk-dev] " Stephen Hemminger
  0 siblings, 1 reply; 4+ messages in thread
From: Fang TongHao @ 2020-01-09  3:14 UTC (permalink / raw)
  To: thomas, ferruh.yigit, arybchenko
  Cc: dev, stable, cunming.liang, jia.guo, Fang TongHao

Hi all,I am from Sangfor Tech.I found a bug when using DPDK in
multiprocess scenario.The secondary process enters
"rte_eth_dev_pci_copy_info" function when initializing.Then it
sets the value of struct "rte_eth_dev_data.dev_flags" to zero,
but this struct is shared by primary process and secondary
process, and the value change is unexpected by primary process.
This may cause very serious damage.I think
the secondary process should not enter "rte_eth_dev_pci_copy_info"
function or changes the value of struct "rte_eth_dev_data.dev_flags"
in shared memory.
I fixed this bug by adding an if-statement to forbid the secondary
process changing the above-mentioned value.
Thansk, All.

Signed-off-by: Fang TongHao <fangtonghao@sangfor.com.cn>
---
 lib/librte_ethdev/rte_ethdev_pci.h | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/lib/librte_ethdev/rte_ethdev_pci.h b/lib/librte_ethdev/rte_ethdev_pci.h
index ccdbb46ec..916de8a14 100644
--- a/lib/librte_ethdev/rte_ethdev_pci.h
+++ b/lib/librte_ethdev/rte_ethdev_pci.h
@@ -59,15 +59,16 @@ rte_eth_copy_pci_info(struct rte_eth_dev *eth_dev,
 	}
 
 	eth_dev->intr_handle = &pci_dev->intr_handle;
-
-	eth_dev->data->dev_flags = 0;
-	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
-		eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
-	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_RMV)
-		eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_RMV;
-
-	eth_dev->data->kdrv = pci_dev->kdrv;
-	eth_dev->data->numa_node = pci_dev->device.numa_node;
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+		eth_dev->data->dev_flags = 0;
+		if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
+			eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
+		if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_RMV)
+			eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_RMV;
+
+		eth_dev->data->kdrv = pci_dev->kdrv;
+		eth_dev->data->numa_node = pci_dev->device.numa_node;
+	}
 }
 
 static inline int
-- 
2.24.1.windows.2


^ permalink raw reply	[flat|nested] 4+ messages in thread
* [dpdk-stable] [PATCH] ethdev: fix secondary process change share memory
@ 2020-01-09  2:35 Fang TongHao
  2020-01-15 10:30 ` [dpdk-stable] [dpdk-dev] " Burakov, Anatoly
  0 siblings, 1 reply; 4+ messages in thread
From: Fang TongHao @ 2020-01-09  2:35 UTC (permalink / raw)
  To: dev; +Cc: Fang TongHao, stable

Hi all,I am from Sangfor Tech.I found a bug when using DPDK in
multiprocess scenario.The secondary process enters
"rte_eth_dev_pci_copy_info" function when initializing.Then it
sets the value of struct "rte_eth_dev_data.dev_flags" to zero,
but this struct is shared by primary process and secondary
process, and the value change is unexpected by primary process.
This may cause very serious damage.I think
the secondary process should not enter "rte_eth_dev_pci_copy_info"
function or changes the value of struct "rte_eth_dev_data.dev_flags"
in shared memory.
I fixed this bug by adding an if-statement to forbid the secondary
process changing the above-mentioned value.
Thansk, All.
Cc: stable@dpdk.org

Signed-off-by: Fang TongHao <fangtonghao@sangfor.com.cn>
---
 lib/librte_ethdev/rte_ethdev_pci.h | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/lib/librte_ethdev/rte_ethdev_pci.h b/lib/librte_ethdev/rte_ethdev_pci.h
index ccdbb46ec..916de8a14 100644
--- a/lib/librte_ethdev/rte_ethdev_pci.h
+++ b/lib/librte_ethdev/rte_ethdev_pci.h
@@ -59,15 +59,16 @@ rte_eth_copy_pci_info(struct rte_eth_dev *eth_dev,
 	}
 
 	eth_dev->intr_handle = &pci_dev->intr_handle;
-
-	eth_dev->data->dev_flags = 0;
-	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
-		eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
-	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_RMV)
-		eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_RMV;
-
-	eth_dev->data->kdrv = pci_dev->kdrv;
-	eth_dev->data->numa_node = pci_dev->device.numa_node;
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+		eth_dev->data->dev_flags = 0;
+		if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
+			eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
+		if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_RMV)
+			eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_RMV;
+
+		eth_dev->data->kdrv = pci_dev->kdrv;
+		eth_dev->data->numa_node = pci_dev->device.numa_node;
+	}
 }
 
 static inline int
-- 
2.24.1.windows.2


^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2020-01-15 10:30 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-01-09  3:14 [dpdk-stable] [PATCH] ethdev: fix secondary process change share memory Fang TongHao
2020-01-10 15:32 ` [dpdk-stable] [dpdk-dev] " Stephen Hemminger
2020-01-13  3:02   ` 方统浩50450
  -- strict thread matches above, loose matches on Subject: below --
2020-01-09  2:35 [dpdk-stable] " Fang TongHao
2020-01-15 10:30 ` [dpdk-stable] [dpdk-dev] " Burakov, Anatoly

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